{"instruction": "You are an expert in relationship extraction. Please extract relationship triples that match the schema definition from the input. Return an empty list for relationships that do not exist. Please respond in the format of a JSON string.", "schema": ["instrument agency", "entity destination", "cause effect", "else"], "input": "the aim of this study was the measurement of the intensity and circumstances of drug use ."}
{"instrument agency": [], "entity destination": [], "cause effect": [], "else": [{"subject": "study", "object": "measurement"}]}